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Carol II

(Encyclopedia) Carol II, 1893–1953, king of Romania, son of King Ferdinand and Queen Marie. While crown prince, he contracted a morganatic marriage with Zizi Labrino but divorced her to marry (1921)…

United States Naval Observatory

(Encyclopedia) United States Naval Observatory, a federal astronomical observatory, located in Washington, D. C. It evolved from the Navy's oldest scientific institution, the Depot of Charts and…

Chemistry: Heterogeneous Equilibria

Heterogeneous EquilibriaChemistrySolution Chemistry/emical EquilibriaWhat Is an Equilibrium?Equilibrium ConstantsHeterogeneous EquilibriaDisturbing Equilibria: Le Chtelier's Principle All of the…

The Devil's Dictionary: Molecule

by Ambrose Bierce MISSMONADMOLECULE -n. The ultimate, indivisible unit of matter. It is distinguished from the corpuscle, also the ultimate, indivisible unit of matter, by a closer…

Chemistry: How and Why Do Things Dissolve?

How and Why Do Things Dissolve?ChemistrySolutionsWhat Are Solutions?How and Why Do Things Dissolve?Determining the Concentration of a SolutionFactors That Affect SolubilityDilutions When making a…

Chemistry: Drawing Lewis Structures

Drawing Lewis StructuresChemistryBonding and Structure in Covalent CompoundsCovalent Compounds Get MysteriousThe Mystery and Wonder of Hybrid OrbitalsDrawing Lewis StructuresResonance…

rare-earth metals

(Encyclopedia) rare-earth metals, in chemistry, group of metals including those of the lanthanide series and actinide series and usually yttrium, sometimes scandium and thorium, and rarely zirconium…

nonmetal

(Encyclopedia) nonmetal, chemical element possessing certain properties by which it is distinguished from a metal. In general, this distinction is drawn on the basis that a nonmetal tends to accept…